Driving mechanism of power-operated sewing-machines.



S. F. STEIN.

DRIVING MECHANISM OF POWER OPERATED SEWING MACHINES.

APPLICATION FILED DEC. 1.9. l9l7.

Patented June 25, 1918.

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SAMUEL F. STEIN, F WILLIAMSPORT, PENNSYLVANIA.

DRIVING MECHANISM OF POWER-OPERATED SEWING-MACHINES.

Specification of Letters Patent.

Patented June 25, 1918.

Application filed December 19, 1917. Serial No. 207,887.

To aZZ whom it may concern Be it known that I, SAMUEL F. STEIN, of Williamsport, in the county of Lycoming, and in the State of Pennsylvania, have invented a Certain new and useful Improvement in Driving Mechanism of Power-Operated- Sewing-Machines, and do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to driving mechanism of sewing machines and in particular to power driving mechanism such as is employed in clothes manufacturing and other plants where a gang or series of machines are driven from the same shaft, and generally stated the object of my invention is to reduce or eliminatethe danger of injury to employees from revolving shafts or other members in performing their duties about the machines and to render easier and more convenient of access (and thereby save time and labor) such parts of the machine as require attention for repair, adjustment, etc., and to do all this with a minimum of modification of the existing power table structures, and for the attainment of my object and to secure other advantages which will be apparent when the embodiment of my invention hereinafter set forth in detail and illustrated in the drawings is understood, my invention consists in the construction substantially as hereinafter specified and claimed.

In the accompanying drawings;

Figure 1 is a top plan view with portions broken away of a sewing machine powertable construction embodying my invention; Fig. 2 is a transverse section thereof with parts in elevation. Referring to the drawings I show a dou ble power table of ordinary construction, it comprising cast iron supporting legs 10 and two alining parallel series of table tops 11, each adapted to support a sewing machine 12 and having a main driving shaft 13 running longitudinally of the series of tables and situated between the two series of tables and being driven continuously by power applied to a band wheel 14 at one end thereof. For each sewing machine there is a treadle controlled transmitter 15 through which power from the continuously running driving shaft 13 may be transmitted at the will of,

the operator to the sewing machine, and in the usual practice there IS a pulley 16, for

each sewing machine on the driving shaft 13 belted to a pulley on the transmitter, and there is a second pulley on the transmitter. belted to a ulley 17 on the sewing machine shaft ad acent the hand wheel thereof.

In ordinary practice the main driving shaft is supported from the floor by bearing brackets and is thus in an exposed position which jeopardizes the safety of employees and is otherwise objectionable. I locate the driving shaft 13 in a trough or depression 18 which is provided in the sewing machine table top and thereby said constantly running shaft 13 and the pulleys thereon are housed, or put in a condition of safety without the necessity of providing a special housing which location near the floor necessitates, and which is required by the insurance companies for the proprietor to get a lower rate of insurance than is required if such parts are not safeguarded. Said trough as best shown in Fig. 2, consists usually of a bottom and sides which extend from the underside of the table top to the bottom, and the shaft hangers, or brackets 19 may be readily supported from the table legs below the bottom, a suitable opening being provided in the bottom for the passage into the trough of the hanger standard. It is not necessary, for the purpose of my invention, that there be a bottom to the trough. The upper side of the trough 18 is closed by a cover that may consist, as best shown in Fig. 1, of Sta-- tionary, or fixed sections 20 reaching be tween opposite tables and hinged sections 21 situated directly above the pulleys 16 on the driving shaft, the hinged sections being provided to give access to the pulleys for the application of the belts thereto, or tightening pulleys to the shaft. The stationary sections may be used for thread stands, or put to any other desired use. Said stationary sections maybe omitted, if desired, in which. case there will be vertical walls or partitions at the ends of the hinged sections, and a bottom between said walls.

The location of the driving shaft in the trough renders the oiling of bearings thereof very convenient because the bearings being close to the top of the trough, an oil hole may be provided in the stationary section 20 lirectlyabove the oil hole of the bearing below so that the oil may be supplied froin-the top of the table, as by an or dinary oil can with a long nozzle, or an oil can 22 placed and kept in a conical hole 23 in the table top in an inverted position so. that oil may drip therefrom to the bearing.

Having thus described my invention what I claim is:

1. As an improvement in power mechanisin for sewing machines, the combination of a table supporting a series of sewing machines and having a depression, a driving shaft located in such depression, driving wheels on said shaft, and means for transmission of power from said wheels to Sewing machines supported on the table top.

2. As an improvement in power mechanism for sewing machines, the combination nism for sewing machines, the combinationof a table supporting a series of sewing machines and having a depression, a driving shaft located in such depression, driving wheels on said shaft, means for transmission of power from said Wheels to sewing machines supported on the table top, and

hinged covers for said depression above said wheels.

4:. As an improvement in power mechamsm for sewing machines, the combination of a table supporting a series of sewing machines and having a, depression, a driving shaft located in such depression, driving wheels on-said shaft, means for transmission from the upper side of the table.

5. As an improvement in power mechanism for sewing machines, the combination of a table supporting a series of sewing machines and having downwardly projecting walls from the table top spaced apart, a driving shaft located in the space between such walls, driving wheels on saidshaft, and means for transmission of power from said wheels to sewing machines supported on the table top. i

6. As an in'iprovement in power mechanism for sewing machines, the combination of a table supporting a series of sewing machines, the table having an opening through its top, a driving shaft located below said opening and accessible through the same,

driving wheels on said shaft, and means for transmission of power from said wheels to sewing machines supported on the table top.

In testimony that I claim the foregoin I have hereunto set my hand.

SAMUEL r. STEIN. 

